chore: docker for ruby/kana

hosts/idols-kana/default.nix

@@ -18,6 +18,7 @@ in
 {
   imports = [
     ../idols-ruby/packages.nix
+    ../idols-ruby/oci-containers
   ];
 
   # supported file systems, so we can mount any removable disks with these filesystems

hosts/idols-ruby/default.nix

@@ -18,6 +18,7 @@ in
 {
   imports = [
     ./packages.nix
+    ./oci-containers
   ];
 
   # Enable binfmt emulation of aarch64-linux, this is required for cross compilation.

hosts/idols-ruby/oci-containers/default.nix

@@ -0,0 +1,34 @@
+{
+  mylib,
+  lib,
+  pkgs,
+  ...
+}:
+{
+  imports = mylib.scanPaths ./.;
+
+  # environment.systemPackages = with pkgs; [
+  #   podman-compose
+  # ];
+
+  virtualisation = {
+    docker.enable = true;
+    # podman = {
+    #   enable = true;
+    #   # Create a `docker` alias for podman, to use it as a drop-in replacement
+    #   dockerCompat = true;
+    #   # Required for containers under podman-compose to be able to talk to each other.
+    #   defaultNetwork.settings.dns_enabled = true;
+    #   # Periodically prune Podman resources
+    #   autoPrune = {
+    #     enable = true;
+    #     dates = "weekly";
+    #     flags = [ "--all" ];
+    #   };
+    # };
+
+    oci-containers = {
+      backend = "docker";
+    };
+  };
+}